Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5758289 | Telephone system and bell sound detecting method thereof | Ronald Lee Lipp, Zhao Min, Hiroki Ohno, Kazuhiko Shimizu, Takahiro Kudo +1 more | 1998-05-26 |
| 5732355 | Telephone system | Ronald Lee Lipp, Atsushi Kaneda, Zhao Min, Hiroki Ohno, Kazuhiko Shimizu +3 more | 1998-03-24 |